Push-type safety knife

Abstract

The invention discloses a finger-push safety knife, comprising a knife housing, a knife holder, a blade and a gear adjuster, wherein the blade is mounted on the knife holder, the knife holder is arranged in the inner cavity of the knife housing, the knife holder is provided with a limit groove, the knife housing is provided with a gear adjustment groove, and the gear adjuster is rotatably mounted on the knife housing; the gear adjustment groove is provided with a knife-out gear position and a knife-locking gear position, when the gear adjuster is turned to the knife-out gear position, the gear adjuster cooperates with the limit groove to make the knife holder move and move to a preset position of the inner cavity, and the gear adjuster is clamped at the knife-out position of the limit groove, thereby limiting the displacement of the knife holder and fixing it at the preset position of the inner cavity by an external force, so as to limit the length of the blade extending out of the knife housing; when the gear adjuster is turned to the knife-locking gear position, the knife holder is reset, and the gear adjuster is clamped at the knife-locking position of the limit groove, thereby limiting the movement of the knife holder and locking it at the initial position of the inner cavity, so as to limit the blade extending out of the knife housing. The invention can fix the knife-out length at a preset length, is convenient to use, and can expand the use range of the safety knife.

Description

Technical Field

[0001] The invention relates to the field of knives, in particular to a finger-push safety knife. Background Art

[0002] Generally, the blade of a safety knife can be retracted into a knife housing and can extend out of the knife housing when in use, thereby improving safety.

[0003] However, the maximum extension distance of the blade of the existing safety knives is fixed. If you want to shorten the extension distance, you can only consciously control the pushing distance and push it to a suitable place. You cannot directly adjust the pushing stroke of the blade. At this time, the pushing stroke of the blade is fixed. However, since the pushing distance is controlled by the user each time, the pushing distance will be different each time, causing various problems. Therefore, it is inconvenient to use and limits the use range of the safety knife. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a finger-push safety knife, which can fix the knife extension length at a preset length, is more convenient to use, and is conducive to expanding the use range of the safety knife.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] The finger-push safety knife comprises a knife housing, a knife holder and a blade, wherein the blade is mounted on the knife holder, the knife holder is slidably arranged in the inner cavity of the knife housing, the finger-push safety knife further comprises a gear adjuster, the knife holder is provided with a limit groove, the knife housing is provided with a gear adjustment groove, and the gear adjuster is rotatably mounted on the knife housing;

[0007] The gear adjustment groove is provided with a knife-out gear position and a knife-locking gear position. When the gear adjuster is rotated to the knife-out gear position by an external force, the gear adjuster cooperates with the limiting groove to enable the knife holder to move axially in the inner cavity and move to a preset position of the inner cavity, and the gear adjuster will be clamped in the knife-out position of the limiting groove, thereby limiting the displacement of the knife holder and fixing it at the preset position of the inner cavity under the action of external force to limit the length of the blade extending out of the knife housing; when the gear adjuster is rotated to the knife-locking gear position by an external force, the knife holder will be able to move and reset to the initial position of the inner cavity without being affected by external force, and the gear adjuster will be clamped in the knife-locking position of the limiting groove, thereby limiting the axial movement of the knife holder in the inner cavity and locking it at the initial position of the inner cavity to limit the blade extending out of the knife housing.

[0008] Furthermore, the tool output gear position includes a first gear position and a second gear position. When the gear selector is rotated to the first gear position, the tool holder can be locked at a first preset position of the inner cavity; when the gear selector is rotated to the second gear position, the tool holder can be locked at a second preset position of the inner cavity; wherein, the distance between the first preset position of the inner cavity and the initial position of the inner cavity is greater than the distance between the second preset position of the inner cavity and the initial position of the inner cavity.

[0009] Furthermore, the gear shifter includes a rotating shaft, a first gear shifting plate and a second gear shifting plate, the rotating shaft is rotatably mounted on the blade housing, the first gear shifting plate and the second gear shifting plate are arranged on the rotating shaft, the first gear shifting plate is located on the gear adjustment groove, and the second gear shifting plate is located on the limiting groove.

[0010] Furthermore, an included angle formed between the first shift adjusting plate and the second shift adjusting plate is 180°.

[0011] Furthermore, the finger-push safety knife also includes a reset component. When the knife holder is pushed by an external force, the reset component will be deformed, and the knife holder can move to a preset position in the inner cavity so that the blade can extend out of the knife housing; when the knife holder is not pushed by an external force, the reset component can restore the deformation, so that the knife holder can retract to the initial position of the inner cavity.

[0012] Furthermore, the reset component is located in the inner cavity, and two ends of the reset component are respectively fixed on the knife housing and the knife holder.

[0013] Furthermore, the reset component is a spring.

[0014] Furthermore, the knife holder is provided with a push piece for contacting with a finger, and the knife housing is provided with a through hole communicating with the inner cavity, so that a finger can pass through the through hole and contact with the push piece.

[0015] Furthermore, the pushing piece is provided with anti-slip convex strips.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When the blade needs to be extended out of the knife shell, the gear adjuster is rotated to the knife-out gear position, and the user pushes the knife holder to the preset position of the inner cavity with a finger and presses the knife holder to fix it in this position, so that the blade can be pushed out of the knife shell to extend a fixed length. Moreover, the gear adjuster cooperates with the limiting groove, so that the gear adjuster can be clamped at the knife-out position of the limiting groove to limit the movement of the knife holder in the inner cavity, and can ensure that the blade can be pushed out to the same length each time it is used, which is conducive to improving cutting efficiency, and is more convenient to use, and is conducive to expanding the use range of the safety knife. When the pressing and fixing of the knife holder is canceled to retract the blade into the knife shell, the gear adjuster is rotated to the knife-locking gear position, and the knife holder will be able to move and reset to the initial position of the inner cavity, and the gear adjuster will be clamped at the knife-locking position of the limiting groove, so that the axial movement of the knife holder in the inner cavity can be limited and locked in the initial position of the inner cavity, so that the blade can be limited from extending out of the knife shell, which is conducive to improving its safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the push-type safety knife of the present invention when the gear adjuster is rotated to the knife locking gear position;

[0019] Figure 2 for Figure 1 Schematic diagram of the local structure;

[0020] Figure 3 It is a schematic diagram of the structure when the gear selector of the push-type safety tool of the present invention rotates to the first gear position;

[0021] Figure 4 for Figure 3 Schematic diagram of the local structure;

[0022] Figure 5 It is a schematic diagram of the structure when the gear selector of the push-type safety tool of the present invention rotates to the second gear position;

[0023] Figure 6 for Figure 5 Schematic diagram of the local structure;

[0024] In the figure: 1, knife housing; 2, knife holder; 3, blade; 4, connecting plate; 5, limiting groove; 6, gear adjustment groove; 7, first gear adjustment plate; 8, second gear adjustment plate; 9, spring; 10, push piece. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] like Figure 1-6The finger-push safety knife shown includes a knife housing 1, a knife holder 2 and a blade 3. The blade 3 is mounted on the knife holder 2. The knife holder 2 is slidably disposed in the inner cavity of the knife housing 1. The finger-push safety knife also includes a gear shifter. A connecting plate 4 is provided on the knife holder 2. A limiting groove 5 is provided on the connecting plate 4. A gear adjustment groove 6 is provided on the knife housing 1. The gear shifter is mounted on the knife housing 1, and the gear shifter can rotate in a direction perpendicular to the knife housing 1.

[0027] It should be noted that the gear adjustment groove 6 is provided with a knife-out gear position and a knife-locking gear position, and an external force is applied to rotate the gear selector. When the gear selector is rotated to the knife-out gear position, the gear selector cooperates with the limiting groove 5, so that the tool holder 2 can move axially in the inner cavity and move to the preset position of the inner cavity, and the gear selector will be clamped in the knife-out position of the limiting groove 5, thereby limiting the displacement of the tool holder 2 and fixing it at the preset position of the inner cavity under the action of external force, so as to limit the length of the blade 3 extending out of the knife housing 1; when the gear selector is rotated to the knife-locking gear position, the tool holder 2 will be able to move and reset to the initial position of the inner cavity without being affected by external force, and the gear selector will be clamped in the knife-locking position of the limiting groove 5, thereby limiting the axial movement of the tool holder 2 in the inner cavity and locking it at the initial position of the inner cavity, so as to limit the blade 3 from extending out of the knife housing 1.

[0028] On the basis of the above structure, when the blade 3 needs to be extended out of the knife housing 1, the gear selector is rotated to the knife-out gear position, and the user pushes the knife holder 2 to the preset position of the inner cavity with a finger and presses the knife holder 2 to fix it in this position, so that the blade 3 can be pushed out of the knife housing 1 and the blade 3 can be extended to a fixed length. Moreover, the gear selector cooperates with the limiting groove 5, so that the gear selector can be clamped at the knife-out position of the limiting groove 5, limiting the movement of the knife holder 2 in the inner cavity, and ensuring that the blade 3 can be pushed out to the same length each time it is used, which is conducive to improving the cutting efficiency, and is more convenient to use, and is conducive to expanding the use range of the safety knife. When the pressing and fixing of the knife holder 2 is canceled to retract the blade 3 to the knife housing 1, the gear selector is rotated to the knife-locking gear position, the knife holder 2 will be able to move and reset to the initial position of the inner cavity, and the gear selector will be clamped at the knife-locking position of the limiting groove 5, so that the axial movement of the knife holder 2 in the inner cavity can be limited and locked in the initial position of the inner cavity, so that the blade 3 can be limited from extending out of the knife housing 1, which is conducive to improving its safety performance. Therefore, when the user uses it, the blade holder 2 can be moved and pressed to fix it, so that the blade 3 can be extended out of the blade housing 1. When the pressure on the blade holder 2 is cancelled, the blade holder 2 can be reset and the blade 3 can be retracted into the blade housing 1, which is beneficial to avoid the user being cut by the blade 3 and the like, and has better safety performance.

[0029] As a preferred embodiment, the tool output gear position includes a first gear position and a second gear position, and an external force is applied to rotate the gear selector. When the gear selector is rotated to the first gear position, the gear selector cooperates with the limiting groove 5, so that the tool holder 2 can move axially in the inner cavity and move to the first preset position of the inner cavity, and the gear selector will be clamped at the tool output position a of the limiting groove 5, so that the tool holder 2 can be fixed at the first preset position of the inner cavity; when the gear selector is rotated to the second gear position, the gear selector cooperates with the limiting groove 5, so that the tool holder 2 can move axially in the inner cavity and move to the second preset position of the inner cavity, and the gear selector will be clamped at the tool output position b of the limiting groove 5, so that the tool holder 2 can be fixed at the second preset position of the inner cavity; wherein, the distance between the first preset position of the inner cavity and the initial position of the inner cavity is greater than the distance between the second preset position of the inner cavity and the initial position of the inner cavity.

[0030] Preferably, in this embodiment, a word mark can be set on the knife housing 1, for example, it can be a "Lock" mark, so that it corresponds to the knife lock gear. For the knife output gear, when the gear selector is rotated to the first gear, the knife holder 2 can be fixed at the first preset position of the inner cavity. At this time, the length of the knife output is the maximum length, and a "25mm" mark is correspondingly provided on the knife housing 1. Similarly, when the gear selector is rotated to the first gear, the knife holder 2 can be fixed at the second preset position of the inner cavity. At this time, the length of the knife output is a shorter length, and a "6mm" mark is correspondingly provided on the knife housing 1. In this way, the knife output length corresponding to each gear can be clearly and intuitively displayed. In this way, it is conducive to the user to make a quick choice according to actual needs, and it is also conducive to improving cutting efficiency. Of course, the setting of the knife output gear is not limited to the above structure, and more gears can be set according to actual needs, so that the blade 3 is fixed at different knife output lengths, so as to better expand the scope of use of the safety knife.

[0031] In this embodiment, the gear selector is a pointer-type structure. As a preferred embodiment, the gear selector includes a rotating shaft, a first gear adjustment plate 7 and a second gear adjustment plate 8. The rotating shaft is rotatably mounted on the blade housing 1. The first gear adjustment plate 7 and the second gear adjustment plate 8 are arranged on the rotating shaft. The first gear adjustment plate 7 is located on the gear adjustment groove 6, and the second gear adjustment plate 8 is located on the limit groove 5. When in use, the first gear adjustment plate 7 can be turned to the corresponding gear position by toggling it, and the second gear adjustment plate 8 can rotate synchronously with the first gear adjustment plate 7.

[0032] It is worth mentioning that the included angle between the first shift plate 7 and the second shift plate 8 is 180°.

[0033] In a more preferred embodiment, the finger-push safety knife further includes a reset component for resetting the knife holder 2. When the knife holder 2 is pushed by an external force, the reset component will be deformed, and the knife holder 2 can move to a preset position of the inner cavity so that the blade 3 can extend out of the knife housing 1; when the knife holder 2 is not pushed by an external force, the reset component can restore the deformation, so that the knife holder 2 can be retracted to the initial position of the inner cavity. In this way, the knife holder can be automatically reset by the reset component, which is conducive to quickly retracting the knife holder 2 to the initial position of the inner cavity, so that the blade 3 can be quickly retracted, which is convenient and quick.

[0034] Specifically, the reset component is located in the inner cavity, and two ends of the reset component are respectively fixed on the knife housing 1 and the connecting plate 4.

[0035] Preferably, the reset component is a spring 9. In this embodiment, a mounting groove is provided on the connecting plate 4, which can be used to install the spring 9, wherein a first positioning column is provided in the mounting groove, and a second positioning column is provided on the inner side of the knife housing 1, so that the spring 9 is placed in the mounting groove, and the two ends of the spring 9 are respectively fixed on the first positioning column and the second positioning column, so that the knife holder 2 can slide in the inner cavity of the knife housing 1 and reset under the action of the spring 9, so that the blade 3 can achieve the action of extending or retracting the knife housing 1.

[0036] In addition, the knife holder 2 is provided with a push piece 10 for contacting with a finger, and the knife housing 1 is provided with a through hole communicating with the inner cavity, so that a finger can pass through the through hole and contact the push piece 10 to move the knife holder 2 or fix it.

[0037] As a preferred embodiment, a plurality of anti-slip convex strips are provided on the pushing member 10 , which is beneficial to improving the pushing efficiency of the blade 3 .

[0038] In addition, the blade housing 1 is a detachable structure, so that the blade holder 2 can be easily taken out from the inner cavity of the blade housing 1 to facilitate the replacement of the blade 3.

[0039] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A finger-push safety knife, comprising a knife housing, a knife holder and a blade, wherein the blade is mounted on the knife holder, and the knife holder is slidably disposed in an inner cavity of the knife housing, characterized in that: The finger-push safety knife also includes a gear shifter, a limiting groove is provided on the knife holder, a gear adjustment groove is provided on the knife housing, and the gear shifter is rotatably mounted on the knife housing; the gear shifter includes a rotating shaft, a first gear adjustment plate and a second gear adjustment plate, the rotating shaft is rotatably mounted on the knife housing, the first gear adjustment plate and the second gear adjustment plate are arranged on the rotating shaft, the first gear adjustment plate is located on the gear adjustment groove, and the second gear adjustment plate is located on the limiting groove; The gear adjustment groove is provided with a knife-out gear and a knife-locking gear. When the gear adjuster is rotated to the knife-out gear by an external force, the gear adjuster cooperates with the limiting groove, so that the knife holder can move axially in the inner cavity and move to a preset position of the inner cavity, and the gear adjuster is clamped at the knife-out position of the limiting groove, thereby limiting the displacement of the knife holder and fixing it at the preset position of the inner cavity under the action of an external force, so as to limit the length of the blade extending out of the knife housing; When the gear selector is rotated to the knife locking position by external force, the tool holder will be able to move and reset to the initial position of the inner cavity without being affected by external force, and the gear selector will be clamped in the knife locking position of the limiting groove, thereby limiting the axial movement of the tool holder in the inner cavity and locking it in the initial position of the inner cavity, so as to limit the blade from extending out of the knife housing.

2. The finger-push safety knife according to claim 1, characterized in that: The tool-exiting gear position includes a first gear position and a second gear position. When the gear selector is rotated to the first gear position, the tool holder can be locked at a first preset position of the inner cavity; when the gear selector is rotated to the second gear position, the tool holder can be locked at a second preset position of the inner cavity; wherein, the distance between the first preset position of the inner cavity and the initial position of the inner cavity is greater than the distance between the second preset position of the inner cavity and the initial position of the inner cavity.

3. The finger-push safety knife according to claim 1, characterized in that: The included angle between the first shifting plate and the second shifting plate is 180°.

4. The finger-push safety knife according to claim 1, characterized in that: The finger-push safety knife also includes a reset component. When the knife holder is pushed by an external force, the reset component will be deformed, and the knife holder can move to a preset position in the inner cavity so that the blade can extend out of the knife housing; when the knife holder is not pushed by an external force, the reset component can restore the deformation, so that the knife holder can retract to the initial position of the inner cavity.

5. The finger-push safety knife according to claim 4, characterized in that: The reset component is located in the inner cavity, and two ends of the reset component are respectively fixed on the knife housing and the knife holder.

6. The finger-push safety knife according to claim 4 or 5, characterized in that: The reset component is a spring.

7. The finger-push safety knife according to claim 1, characterized in that: The knife holder is provided with a push piece for contacting with a finger, and the knife housing is provided with a through hole communicating with the inner cavity, so that a finger can pass through the through hole and contact with the push piece.

8. The finger-push safety knife according to claim 7, characterized in that: The pushing piece is provided with anti-slip convex strips.

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